/Engine/Source/Runtime/Engine/Classes/Engine/World.h
Trace a ray against the world using object types and return if a blocking hit is found.
TRUE if any hit is found
bool LineTraceTestByObjectType ( const FVector & Start, const FVector & End, const [FCollisionObjectQueryParams](API\Runtime\Engine\FCollisionObjectQueryParams) & ObjectQueryParams, const [FCollisionQueryParams](API\Runtime\Engine\FCollisionQueryParams) & Params ) const